Leaded gasoline is still sold in Afghanistan, Algeria, Iraq, Myanmar, North Korea, and Yemen. Most think that the brain-damaging additive was banned in the U.S in 1995, but not for 167,000 piston-engined aircraft that use leaded aviation fuel.

Jed Lipinski profiles Shannon Galpin, avid cyclist and founder of a nonprofit organization to aid women in conflict zones, who is hoping to improve women's rights in Afghanistan by supporting its fledgling bicycle culture.

The proposal is simple. Instead of investing billions of dollars more on elaborate infrastructure or trust a corrupted police force, the concept is to nudge this complex system at two targeted points in the city, argues Mitchell Sutika Sipus.

For more than 1,000 U.S. civilians being sent to Afghanistan to aid the nation's political and economic recovery, training starts in a small Indiana city where the Army and National Guard have built a mock Afghan city complex.